c# - How to minimize the memory used by array -

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i trying optimize memory usage in game. lot of memory taken huge array of struct:

/// <summary> /// represents keyframe in animation track. /// </summary> public struct bonekeyframe {     /// <summary>     /// creats new bonekeyframe.     /// </summary>     /// <param name="transform">the transform keyframe.</param>     /// <param name="time">the time in ticks keyframe.</param>     public bonekeyframe(matrix transform, long time)     {         this.transform = transform;         this.time = time;     }     /// <summary>     /// transform keyframe.     /// </summary>     public readonly matrix transform;     /// <summary>     /// time keyframe.     /// </summary>     public readonly long time;  }

i want replace transform member custom class/struct. should contain optional translation vector3, optional scale vector3 , rotation quaternion (vector4). how can design becomes compact possible... point reduce total size of bonekeyframe array.


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